I've only attended one and it was @STAEE. I was in the student section, so I was expecting to be heckled, but I was pushed down the stairs and then spat on by a woman in her 60-somethings [separate incidents].
A police officer saw it happen and told me "You shouldn't have worn yellow" but the usher escorted me back to my seat and ended up kicking out the people who pushed me. For the rest of the game the few people around me would chant 'faggot, faggot' to me.
Edit: Wow that sounds whiney. Would've been better if we won, but that was the trash tornado game. Did have a pretty fun tailgate though!